patch 7.4.2286
Problem:    The tee program isn't included.  Makefile contains build
            instructions that don't work.
Solution:   Update the Filelist and build instructions. Remove build
            instructions for DOS and old Windows.  Add the tee program.
diff --git a/nsis/gvim.nsi b/nsis/gvim.nsi
index 2ae7d41..26d7aab 100644
--- a/nsis/gvim.nsi
+++ b/nsis/gvim.nsi
@@ -188,6 +188,7 @@
 	File /oname=install.exe ${VIMSRC}\installw32.exe
 	File /oname=uninstal.exe ${VIMSRC}\uninstalw32.exe
 	File ${VIMSRC}\vimrun.exe
+	File /oname=tee.exe ${VIMSRC}\teew32.exe
 	File /oname=xxd.exe ${VIMSRC}\xxdw32.exe
 	File ${VIMTOOLS}\diff.exe
 	File ${VIMRT}\vimtutor.bat